In Python, a for loop is used for iterating over a sequence (list, tuple, dictionary, set, or string).

Print each car in the cars list.

cars = ["Ferrari", "Maserati", "Alfa Romeo"]

for x in cars:
    print(x) #print each car in the cars list

Output:

Ferrari
Maserati
Alfa Romeo

Print each letter in the string “Alfa Romeo”.

for x in "Alfa Romeo":
    print(x) 

Output:

A
l
f
a
 
R
o
m
e
o

The else statement specifies a block of code to be executed when the loop is finished.

for x in range(4):
    print(x)
else:
    print("All done!")

Output:

0
1
2
3
All done!

The break statement will stop the loop before it has looped through all the items.

Example 1 – the break statement comes after the print statement.

cars = ["Ferrari", "Maserati", "Alfa Romeo"]

for x in cars:
  print(x) 
  if x == "Maserati":
      break

Example 2 – the break statement comes before the print statement.

cars = ["Ferrari", "Maserati", "Alfa Romeo"]


for x in cars:
    if x == "Maserati":
        break
    print(x) 

Output 1:

Ferrari
Maserati

Output 2:

Ferrari

The continue statement will stop the current iteration, and continue with the next iteration.

cars = ["Ferrari", "Maserati", "Alfa Romeo"]

for x in cars:
    if x == "Maserati":
        cars
    print(x) 

Output:

Ferrari
Alfa Romeo

The range() function is used to loop through a set of code a specified number of times.

The range() function starts from 0 by default, and increments by 1 (by default), and ends at a specified number.

for x in range(4):
    print(x) 

Output:

0
1
2
3

The range() function defaults to 0 as a starting value. To start with another value, an additional parameter is added.

For example: range(1, 4), which means the values 1 to 4 (1, 2, 3).

for x in range(1, 4):
    print(x) 

Output:

1
2
3

it is also possible to specify the increment value by adding a third parameter: range(1, 15, 3)

The range (1, 15) will increment by 3s.

for x in range(1, 15, 3):
    print(x) 

Output:

1
4
7
10
13

A nested loop is a loop inside a loop where the inner loop is executed one time for each iteration of the outer loop.

colors = ["red", "yellow", "white"]
cars = ["Ferarri", "Maserati", "Alfa Romeo"]

for x in colors:
    for y in cars:
        print(x, y)

Output:

red Ferarri
red Maserati
red Alfa Romeo
yellow Ferarri
yellow Maserati
yellow Alfa Romeo
white Ferarri
white Maserati
white Alfa Romeo

---